- Timestamp:
- 2020-09-15T12:49:18+02:00 (4 years ago)
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NEMO/branches/2020/temporary_r4_trunk/src/TOP/PISCES/P4Z/p4zfechem.F90
r13466 r13469 89 89 ! Chemistry is supposed to be fast enough to be at equilibrium 90 90 ! ------------------------------------------------------------ 91 DO jk = 1, jpkm1 92 DO jj = 1, jpj 93 DO ji = 1, jpi 94 zTL1(ji,jj,jk) = ztotlig(ji,jj,jk) 95 zkeq = fekeq(ji,jj,jk) 96 zfesatur = zTL1(ji,jj,jk) * 1E-9 97 ztfe = trb(ji,jj,jk,jpfer) 98 ! Fe' is the root of a 2nd order polynom 99 zFe3 (ji,jj,jk) = ( -( 1. + zfesatur * zkeq - zkeq * ztfe ) & 100 & + SQRT( ( 1. + zfesatur * zkeq - zkeq * ztfe )**2 & 101 & + 4. * ztfe * zkeq) ) / ( 2. * zkeq ) 102 zFe3 (ji,jj,jk) = zFe3(ji,jj,jk) * 1E9 103 zFeL1(ji,jj,jk) = MAX( 0., trb(ji,jj,jk,jpfer) * 1E9 - zFe3(ji,jj,jk) ) 104 END DO 105 END DO 106 END DO 91 DO_3D_11_11( 1, jpkm1 ) 92 zTL1(ji,jj,jk) = ztotlig(ji,jj,jk) 93 zkeq = fekeq(ji,jj,jk) 94 zfesatur = zTL1(ji,jj,jk) * 1E-9 95 ztfe = trb(ji,jj,jk,jpfer) 96 ! Fe' is the root of a 2nd order polynom 97 zFe3 (ji,jj,jk) = ( -( 1. + zfesatur * zkeq - zkeq * ztfe ) & 98 & + SQRT( ( 1. + zfesatur * zkeq - zkeq * ztfe )**2 & 99 & + 4. * ztfe * zkeq) ) / ( 2. * zkeq ) 100 zFe3 (ji,jj,jk) = zFe3(ji,jj,jk) * 1E9 101 zFeL1(ji,jj,jk) = MAX( 0., trb(ji,jj,jk,jpfer) * 1E9 - zFe3(ji,jj,jk) ) 102 END_3D 107 103 ! 108 104 109 105 zdust = 0. ! if no dust available 110 DO jk = 1, jpkm1 111 DO jj = 1, jpj 112 DO ji = 1, jpi 113 ! Scavenging rate of iron. This scavenging rate depends on the load of particles of sea water. 114 ! This parameterization assumes a simple second order kinetics (k[Particles][Fe]). 115 ! Scavenging onto dust is also included as evidenced from the DUNE experiments. 116 ! -------------------------------------------------------------------------------------- 117 zhplus = max( rtrn, hi(ji,jj,jk) ) 118 fe3sol = fesol(ji,jj,jk,1) * ( zhplus**3 + fesol(ji,jj,jk,2) * zhplus**2 & 119 & + fesol(ji,jj,jk,3) * zhplus + fesol(ji,jj,jk,4) & 120 & + fesol(ji,jj,jk,5) / zhplus ) 121 ! 122 zfeequi = zFe3(ji,jj,jk) * 1E-9 123 zfecoll = 0.5 * zFeL1(ji,jj,jk) * 1E-9 124 ! precipitation of Fe3+, creation of nanoparticles 125 precip(ji,jj,jk) = MAX( 0., ( zFe3(ji,jj,jk) * 1E-9 - fe3sol ) ) * kfep * xstep 126 ! 127 ztrc = ( trb(ji,jj,jk,jppoc) + trb(ji,jj,jk,jpgoc) + trb(ji,jj,jk,jpcal) + trb(ji,jj,jk,jpgsi) ) * 1.e6 128 IF( ln_dust ) zdust = dust(ji,jj) / ( wdust / rday ) * tmask(ji,jj,jk) & 129 & * EXP( -gdept_n(ji,jj,jk) / 540. ) 130 IF (ln_ligand) THEN 131 zxlam = xlam1 * MAX( 1.E-3, EXP(-2 * etot(ji,jj,jk) / 10. ) * (1. - EXP(-2 * trb(ji,jj,jk,jpoxy) / 100.E-6 ) )) 132 ELSE 133 zxlam = xlam1 * 1.0 134 ENDIF 135 zlam1b = 3.e-5 + xlamdust * zdust + zxlam * ztrc 136 zscave = zfeequi * zlam1b * xstep 137 138 ! Compute the different ratios for scavenging of iron 139 ! to later allocate scavenged iron to the different organic pools 140 ! --------------------------------------------------------- 141 zdenom1 = zxlam * trb(ji,jj,jk,jppoc) / zlam1b 142 zdenom2 = zxlam * trb(ji,jj,jk,jpgoc) / zlam1b 143 144 ! Increased scavenging for very high iron concentrations found near the coasts 145 ! due to increased lithogenic particles and let say it is unknown processes (precipitation, ...) 146 ! ----------------------------------------------------------- 147 zlamfac = MAX( 0.e0, ( gphit(ji,jj) + 55.) / 30. ) 148 zlamfac = MIN( 1. , zlamfac ) 149 zdep = MIN( 1., 1000. / gdept_n(ji,jj,jk) ) 150 zcoag = 1E-4 * ( 1. - zlamfac ) * zdep * xstep * trb(ji,jj,jk,jpfer) 151 152 ! Compute the coagulation of colloidal iron. This parameterization 153 ! could be thought as an equivalent of colloidal pumping. 154 ! It requires certainly some more work as it is very poorly constrained. 155 ! ---------------------------------------------------------------- 156 zlam1a = ( 0.369 * 0.3 * trb(ji,jj,jk,jpdoc) + 102.4 * trb(ji,jj,jk,jppoc) ) * xdiss(ji,jj,jk) & 157 & + ( 114. * 0.3 * trb(ji,jj,jk,jpdoc) ) 158 zaggdfea = zlam1a * xstep * zfecoll 159 ! 160 zlam1b = 3.53E3 * trb(ji,jj,jk,jpgoc) * xdiss(ji,jj,jk) 161 zaggdfeb = zlam1b * xstep * zfecoll 162 ! 163 tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) - zscave - zaggdfea - zaggdfeb & 164 & - zcoag - precip(ji,jj,jk) 165 tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zscave * zdenom1 + zaggdfea 166 tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + zscave * zdenom2 + zaggdfeb 167 zscav3d(ji,jj,jk) = zscave 168 zcoll3d(ji,jj,jk) = zaggdfea + zaggdfeb 169 ! 170 END DO 171 END DO 172 END DO 106 DO_3D_11_11( 1, jpkm1 ) 107 ! Scavenging rate of iron. This scavenging rate depends on the load of particles of sea water. 108 ! This parameterization assumes a simple second order kinetics (k[Particles][Fe]). 109 ! Scavenging onto dust is also included as evidenced from the DUNE experiments. 110 ! -------------------------------------------------------------------------------------- 111 zhplus = max( rtrn, hi(ji,jj,jk) ) 112 fe3sol = fesol(ji,jj,jk,1) * ( zhplus**3 + fesol(ji,jj,jk,2) * zhplus**2 & 113 & + fesol(ji,jj,jk,3) * zhplus + fesol(ji,jj,jk,4) & 114 & + fesol(ji,jj,jk,5) / zhplus ) 115 ! 116 zfeequi = zFe3(ji,jj,jk) * 1E-9 117 zfecoll = 0.5 * zFeL1(ji,jj,jk) * 1E-9 118 ! precipitation of Fe3+, creation of nanoparticles 119 precip(ji,jj,jk) = MAX( 0., ( zFe3(ji,jj,jk) * 1E-9 - fe3sol ) ) * kfep * xstep 120 ! 121 ztrc = ( trb(ji,jj,jk,jppoc) + trb(ji,jj,jk,jpgoc) + trb(ji,jj,jk,jpcal) + trb(ji,jj,jk,jpgsi) ) * 1.e6 122 IF( ln_dust ) zdust = dust(ji,jj) / ( wdust / rday ) * tmask(ji,jj,jk) & 123 & * EXP( -gdept_n(ji,jj,jk) / 540. ) 124 IF (ln_ligand) THEN 125 zxlam = xlam1 * MAX( 1.E-3, EXP(-2 * etot(ji,jj,jk) / 10. ) * (1. - EXP(-2 * trb(ji,jj,jk,jpoxy) / 100.E-6 ) )) 126 ELSE 127 zxlam = xlam1 * 1.0 128 ENDIF 129 zlam1b = 3.e-5 + xlamdust * zdust + zxlam * ztrc 130 zscave = zfeequi * zlam1b * xstep 131 132 ! Compute the different ratios for scavenging of iron 133 ! to later allocate scavenged iron to the different organic pools 134 ! --------------------------------------------------------- 135 zdenom1 = zxlam * trb(ji,jj,jk,jppoc) / zlam1b 136 zdenom2 = zxlam * trb(ji,jj,jk,jpgoc) / zlam1b 137 138 ! Increased scavenging for very high iron concentrations found near the coasts 139 ! due to increased lithogenic particles and let say it is unknown processes (precipitation, ...) 140 ! ----------------------------------------------------------- 141 zlamfac = MAX( 0.e0, ( gphit(ji,jj) + 55.) / 30. ) 142 zlamfac = MIN( 1. , zlamfac ) 143 zdep = MIN( 1., 1000. / gdept_n(ji,jj,jk) ) 144 zcoag = 1E-4 * ( 1. - zlamfac ) * zdep * xstep * trb(ji,jj,jk,jpfer) 145 146 ! Compute the coagulation of colloidal iron. This parameterization 147 ! could be thought as an equivalent of colloidal pumping. 148 ! It requires certainly some more work as it is very poorly constrained. 149 ! ---------------------------------------------------------------- 150 zlam1a = ( 0.369 * 0.3 * trb(ji,jj,jk,jpdoc) + 102.4 * trb(ji,jj,jk,jppoc) ) * xdiss(ji,jj,jk) & 151 & + ( 114. * 0.3 * trb(ji,jj,jk,jpdoc) ) 152 zaggdfea = zlam1a * xstep * zfecoll 153 ! 154 zlam1b = 3.53E3 * trb(ji,jj,jk,jpgoc) * xdiss(ji,jj,jk) 155 zaggdfeb = zlam1b * xstep * zfecoll 156 ! 157 tra(ji,jj,jk,jpfer) = tra(ji,jj,jk,jpfer) - zscave - zaggdfea - zaggdfeb & 158 & - zcoag - precip(ji,jj,jk) 159 tra(ji,jj,jk,jpsfe) = tra(ji,jj,jk,jpsfe) + zscave * zdenom1 + zaggdfea 160 tra(ji,jj,jk,jpbfe) = tra(ji,jj,jk,jpbfe) + zscave * zdenom2 + zaggdfeb 161 zscav3d(ji,jj,jk) = zscave 162 zcoll3d(ji,jj,jk) = zaggdfea + zaggdfeb 163 ! 164 END_3D 173 165 ! 174 166 ! Define the bioavailable fraction of iron … … 178 170 IF( ln_ligand ) THEN 179 171 ! 180 DO jk = 1, jpkm1 181 DO jj = 1, jpj 182 DO ji = 1, jpi 183 zlam1a = ( 0.369 * 0.3 * trb(ji,jj,jk,jpdoc) + 102.4 * trb(ji,jj,jk,jppoc) ) * xdiss(ji,jj,jk) & 184 & + ( 114. * 0.3 * trb(ji,jj,jk,jpdoc) ) 185 ! 186 zlam1b = 3.53E3 * trb(ji,jj,jk,jpgoc) * xdiss(ji,jj,jk) 187 zligco = 0.5 * trn(ji,jj,jk,jplgw) 188 zaggliga = zlam1a * xstep * zligco 189 zaggligb = zlam1b * xstep * zligco 190 tra(ji,jj,jk,jplgw) = tra(ji,jj,jk,jplgw) - zaggliga - zaggligb 191 zlcoll3d(ji,jj,jk) = zaggliga + zaggligb 192 END DO 193 END DO 194 END DO 172 DO_3D_11_11( 1, jpkm1 ) 173 zlam1a = ( 0.369 * 0.3 * trb(ji,jj,jk,jpdoc) + 102.4 * trb(ji,jj,jk,jppoc) ) * xdiss(ji,jj,jk) & 174 & + ( 114. * 0.3 * trb(ji,jj,jk,jpdoc) ) 175 ! 176 zlam1b = 3.53E3 * trb(ji,jj,jk,jpgoc) * xdiss(ji,jj,jk) 177 zligco = 0.5 * trn(ji,jj,jk,jplgw) 178 zaggliga = zlam1a * xstep * zligco 179 zaggligb = zlam1b * xstep * zligco 180 tra(ji,jj,jk,jplgw) = tra(ji,jj,jk,jplgw) - zaggliga - zaggligb 181 zlcoll3d(ji,jj,jk) = zaggliga + zaggligb 182 END_3D 195 183 ! 196 184 plig(:,:,:) = MAX( 0., ( ( zFeL1(:,:,:) * 1E-9 ) / ( trb(:,:,:,jpfer) +rtrn ) ) )
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